Please help asap The graph below shows changes in the number of families of organisms that existed during a time period in Earth's history. Which of the following describes what would most likely be happening between points Y and Z on the graph?

Adaptive radiation is occurring following a mass-extinction event.
A mass extinction is occurring as a result of changing environmental conditions.
Genetic variation is increasing as a result of the fusion of hybrid zones.
The total population of organisms is increasing as a result of genetic drift.

Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. to accommodate more people, there has been increased construction of beachfront resorts and condominiums. how is this impacting sea turtle numbers and biodiversity and why? a. the increased human population in coastal areas has meant that more food is available to the turtles (e. g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles. b. there has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches. c. this has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction. d. this has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.

Rue or false siblings look simila rbecause they each have some traits of their parents.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point